Yeah I mean I think the initial point of connection where you see they gonna like each other more than the other students is where they find out that they both wanna be Hokage. Most relationships need a common ground between the two people, something that connects them. You can see how happy they are when they realise that they both have the same dream and how in that instant, a bond is formed. Minato at the time was clearly the strongest jonin in the leaf so Obito might have felt that there's a real good chance that he'll become Hokage and so to him, to learn from this guy, get advice from this guy, be liked alot by this guy, and spend so much time with him, well, yeah I guess I can see how Obito would see him as a father figure, especially as the orphan that he was. I think you right man it all makes sense the way you put it.